CN100367425C

CN100367425C - Magnetic actuator

Info

Publication number: CN100367425C
Application number: CNB2005100978797A
Authority: CN
Inventors: 中川隆文; 月间满; 竹内敏惠; 小山健一; 松田哲也; 远矢将大
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2002-08-27
Filing date: 2003-08-27
Publication date: 2008-02-06
Anticipated expiration: 2023-08-27
Also published as: CN1737966A; JP2008288605A

Abstract

A magnetic actuator includes a first yoke, an armature which is provided inside the first yoke and made movable in reciprocating motion along a first direction inside the first yoke, first and second coils fitted inside the first yoke, a pair of second yokes affixed to the first yoke along a second direction, and permanent magnets affixed to the second yokes in a manner that the permanent magnets are positioned face to face with the armature. In the magnetic actuator thus constructed, fluxes generated by the first and second coils pass through first magnetic circuits whereas fluxes generated by the permanent magnets pass through second magnetic circuits differing from the first magnetic circuits.

Description

Electromagnetic operating device

The application is to be dividing an application of August 27, application number in 2003 are 03155074.6, denomination of invention is electromagnetic operating device application the applying date.

Technical field

The present invention relates to driving electric and carry the operating means of the switch that uses in the distribution system, particularly relate to electromagnetic operating device with permanent magnet and solenoid.

Background technology

Figure 19 is the figure (for example with reference to patent documentation 1) that represents the primary structure of switching device 500 in the past.

In the drawings, the 100th, electromagnetic operating device, the 200th, directly be connected on the electromagnetic operating device 100, and carry out the switch of the open and close of circuit.300, the 301st, spring is provided with two places in the upper and lower part of electromagnetic operating device 100, when carrying out the switch drive of switch 200 by electromagnetic operating device 100, and auxiliary this switch drive.

The primary structure of described electromagnetic operating device 100 as shown in figure 18, by constituting: left side yoke 201, right side yoke 202, go up yoke 203, the integrated respectively die-cut folded yoke 250 of magnetic steel flaggy of yoke 204 down with the lower part; The permanent magnet of installing by solid

interior yoke

201b, 202b on the 202a of bar portion that is separately positioned on left side 201a of bar portion of yoke and right side yoke 205; In yoke 250, can move the mover 206 of given stroke; First, second coil 207,208.It should be noted that this first, second coil 207,208 is set to have equal magnetic flux (AT).And mover 206 is provided with and connects yoke 203,204 up and down and be connected rod 209 on the described switch 200.It should be noted that, between described permanent magnet 205 and mover 206, be provided with space g.In addition, the top that Figure 18 is illustrated in figure is provided with the example of switch 200, and is different with Figure 19 installation site.

The magnetic field that described mover 206 produces by permanent magnet 205 remains on the first position 203a of yoke 203.And, make second coil 208 become same polarity by excitation with permanent magnet, the mover 206 that is kept by last yoke 203 is cancelled confining force, and yoke 204 1 sides move with given stroke downwards, arrive yoke 204 down, if stop the excitation of described second coil 208,, remain on down the second position 204a of yoke 204 then owing to the magnetic field of permanent magnet 205 generations.Described given haul distance is the essential value that makes contact 210 disconnections of described switch 200.In example shown in Figure 180, mover 206 remains on down the second position 204a of yoke 204, and has the space G that is equivalent to described stroke between the last yoke 203.It should be noted that, described spring 301 shown in Figure 19 is to second coil, 208 excitations, and during beginning mover 206 mobile, the open of contact by rod 209 auxiliary described switches 200 drives, when when state shown in Figure 180 becomes junction closure, the spring 300 on top is auxiliary.

Then, if equally to first coil, 207 excitations, then mover 206 moves to last yoke 203 1 sides shown in Figure 180, the contact 210 of Closing Switch 200, and remain on the first position 203a of yoke 203.

Below, according to the operation principle of Figure 17 (a)～(c) explanation mover 206.It should be noted that the top that Figure 17 is illustrated in figure is provided with the example of switch 200, and is different with described Figure 19 position.

(1) among Figure 17 (a), contact 210 is closure states, and mover 206 remains on the first position 203a of yoke 203, and first, second coil 207,208 is not by excitation.At this, the N among the figure represents the polarity that permanent magnet produces on 206 of movers, and S represents the polarity that permanent magnet produces on the face of the 201a of bar portion, 202a shown in Figure 180.Under this state, permanent magnet 205 forms two magnetic circuit L ₁And L ₂, produce each magnetic flux  _PM1And  _PM2 _PM1Path (L ₁) upward magnetic resistance is low, so  _PM1＞＞ _PM2Therefore, produce attraction at

mover

206 and 203 of last yokes.At this, attraction is by F= ²/ S/ μ ₀=Bg ²/ S/ μ ₀Expression, Bg is the magnetic flux density in gap, S is the contact area of mover 206 and last yoke 203.

(2) then, if to second coil, 208 excitations, then shown in Figure 17 (b), produce magnetic flux  _Coil2-1And  _Coil2-2The magnetic flux  that synthetic permanent magnet 205 produces _PM1And  _PM2If,  _PM2+  _Coil2-1＞ _PM1- _Coil2-2, then produce the power that the direction of mover 206 downward yokes 204 is drawn.

(3) if mover 206 leaves yoke 203, then  _PM2+  _Coil2-1＞＞ _PM1- _Coil2-2So shown in Figure 17 (c), mover 206 moves given stroke, arrive the second position 204a of yoke 204 down.

(4),, just become  if stop the excitation of second coil 208 at this _PM1＜＜ _PM2, same shown in Figure 17 (c), mover 206 remains on down the second position 204a of yoke 204.

As mentioned above, in yoke 250, move, the contact 210 of the switch of installing on the rod 209 that directly is connected on the mover 206 200 is disconnected, carry out the electric current blocking that electric power is carried distribution system with given stroke by mover 206.

It should be noted that, become the closure state of the contact 210 of Figure 17 (a) for off-state from the contact 210 shown in described Figure 17 (c), by to first coil, 207 excitations, with with described identical principle, the mover 206 upwards direction of yoke 203 moves, stop the excitation of first coil 207, by the magnetic flux  of permanent magnet 205 _PM1, mover 206 remains on the first position 203a of yoke 203, and contact 210 closures of switch 200, carries out the input of electric current.

Patent documentation 1 is meant EP 0721650B1 communique.

Like this, in the electromagnetic operating device 100 that in switching device 500 in the past, uses, the permanent magnet 205 that is used for mover 206 is remained on first or second position is installed in

bar

201a, 202a by firm

internal yoke

201b, 202b, so be present in the magnetic circuit that the coil 207,208 that is used to drive mover 206 produces, so, produce vortex flow among described permanent magnet 205 and internal yoke 201b, the 202b by having omitted the switching of illustrated field power supply.

This vortex flow is not only damaged the response characteristic of electromagnetic operating device 200, and exists the maximization that causes described field power supply and cost this problem that rises.

Summary of the invention

The existence of problem in view of the above, main purpose of the present invention is: by on the magnetic circuit different with the magnetic circuit that drives mover the generation that permanent magnet reduces vortex flow being set.

Promptly provide by shared the mover driving magnetic circuit based on coil magnetization by first yoke, the mover of being shared based on permanent magnet by second yoke keeps with the structure of magnetic circuit response characteristic being improved, and has the electromagnetic operating device of small low-cost power supply.Another purpose of the present invention is: when the contact open and close of switching device, make differently by magnetic space the opposite side of a side that yoke kept, between yoke and the mover with the mover that is arranged in the yoke, the control characteristic of electromagnetic operating device is improved.

In addition, the present invention also aims to: make down on the sectional area ratio of yoke yoke little, make the magnetomotive force difference of coil in addition, reduce to realize lightness and cost.

For realizing described main purpose, the invention provides a kind of electromagnetic operating device, it is characterized in that, comprising: first yoke that comprises the assembly of laminated metal thin plate; Be attached to vertical lip-deep second yoke of stacked direction with the sheet metal of described first yoke; Be attached to the permanent magnet on described second yoke; In described first yoke and along first direction on described first yoke first position and the stroke between second position in can come and go mobile mover; And at least one coil, wherein, the magnetic flux that is produced by described at least one coil is by comprising first magnetic circuit of the described mover and first yoke, thereby the direction towards one of them position at described first and second positions moves described mover, and, the magnetic flux that is produced by described permanent magnet is by comprising second magnetic circuit of described permanent magnet, first yoke, second yoke and described mover, thereby keeps described mover at one of them position at described first and second positions.

Electromagnetic operating device of the present invention has and is arranged in first yoke and is coming and going the mover that moves on the first direction and carrying permanent magnet and be attached to second yoke on described first yoke;

On described first yoke, has first, second position that contacts with described mover, and be provided with first, second coil, by described first or second coil by excitation, described mover and described first yoke form first magnetic circuit, and come and go mobile with given stroke towards first position or second position of described first yoke;

Described permanent magnet is arranged on second magnetic circuit that is formed by described first yoke, second yoke and mover, be provided with by this magnetic flux, described mover is kept by first or second position of described first yoke, and drives the driving mechanism of described mover to described first direction.

Description of drawings

Following brief description accompanying drawing.

Fig. 1 is the schematic diagram of the operating means main composition part of the expression embodiment of the invention 1.

Fig. 2 is the schematic diagram of the operating means of the expression embodiment of the invention 1.

Fig. 3 is the yoke of the operating means of the expression embodiment of the invention 1, the concept map of mover.

Fig. 4 is the schematic diagram of the mover of the expression embodiment of the invention 1.

Fig. 5 is the figure of the operating means of other embodiment of mover of the expression embodiment of the invention 1 and embodiment 2.

Fig. 6 is the figure of other embodiment of the mover of the expression embodiment of the invention 1.

Fig. 7 is the figure of the operating means of the expression embodiment of the invention 2.

Fig. 8 is based on the operation principle key diagram of the operating means of the embodiment of the invention 1～6.

Fig. 9 is the schematic diagram of the operating means of the expression embodiment of the invention 3.

Figure 10 is the schematic diagram of second yoke of the expression embodiment of the invention 3.

Figure 11 is the schematic diagram of main composition part of the operating means of the expression embodiment of the invention 4.

Figure 12 is the schematic diagram of the operating means of the expression embodiment of the invention 4.

Figure 13 is the schematic diagram of the operating means of the expression embodiment of the invention 5.

Figure 14 is the schematic diagram of the operating means of the expression embodiment of the invention 6.

Figure 15 is the yoke of the operating means of the expression embodiment of the invention 6, the concept map of mover.

Figure 16 is the operation principle key diagram of the operating means of the embodiment of the invention 6.

Figure 17 is the operation principle key diagram of operating means in the past.

Figure 18 is the figure that represents operating means in the past.

Figure 19 is the figure that represents switching device in the past.

The explanation of symbol:

The 1-yoke; The last yoke of 1a-; Yoke under the 1b-; 1c-side yoke; The 1d-recess; The 1e-protuberance; 2,2c-mover; The general portion of 2a-mover; 2b-mover end face; The 2d-plywood; The 2e-recess; The 2f-laminated section; 2g-laminated section end face; 3-first coil; The 3a-coil; 4,4a-second coil; 5,5a, 5b, 5c-second yoke; 6,6a, 6b, 6c-permanent magnet; The 7-bar; 8-first position; 9-second position; 10,10a-end plate; The 10b-peristome; 10c-end plate end face; The 11-fastening bolt; The 12-spring; The 13-pad; 15-adjusts bolt; The 16-movable core; The 100-operating means; The 200-switch; The 201-contact; The 209-movable axis; The 500-switching device; The g-space; G1-first space; G2-second space; W ₁-last yoke thickness; W ₂-following yoke thickness.

Embodiment

(embodiment 1)

Below, the electromagnetic operating device 100 of the embodiment of the invention 1 is described with reference to Fig. 1～Fig. 6, Fig. 8.

Fig. 1 is the schematic diagram of expression electromagnetic operating device 100 main composition parts, and Fig. 2 is the schematic diagram after installing.Fig. 3 is that expression is from the yoke of the arrow A direction observation of Fig. 1, the concept map of mover.

In the drawings, 1 is first yoke, and 1a is last yoke, and 1b is following yoke, and 1c is the side yoke, the 2nd, and mover, 3 is first coils, and 4 is second coils, and 5 is second yokes, the 6th, permanent magnet, the 7th, bar, 8 is first positions, 9 is second positions.The 209th, rod connects up and down

yoke

1a, 1b and is connected on the mover 2, and is connected on the contact 210 of switch 200.

First yoke 1 by one die-cut last yoke 1a, following stacked formation of electromagnetism sheet metal of yoke 1b, side yoke 1c, bar 7.Have contact maintenance mover 2 on last yoke 1a first one is 8, on the yoke 1b the second same position 9 is being arranged also down.

In this first yoke 1, the first direction that is provided with in the vertical direction that is equivalent to Fig. 1 can come and go mover 2, first,

second coil

3,4 that moves given stroke.And, with the second direction of described first direction quadrature, be provided with a pair of second yoke 5 across side yoke 1c.

Described mover 2 is electromagnetism sheet metal or steel-sheet stepped construction, is provided with the rod 209 that is connected on the switch 200.It should be noted that between mover 2 and bar 7, to have space g.The described second paired yoke 5 is solid steel plate manufacturings, is rectangular configuration, is installed on the described side yoke 1c with omitting illustrated bolt or fastenings.Permanent magnet 6 is arranged on the length direction central portion of described second yoke 5, under the state of assembling, is configured to by gap g relative with described mover 2.

At this, first position 8 that yoke 1a is gone up in 2 contacts of Fig. 3 (a) expression mover is by being arranged on the state of the permanent magnet 6 maintenance movers 2 on described second yoke 5.

In addition, this state is the state of contact 210 closures of switch 200.And Fig. 3 (b) represents mover 2 same contacts second position, the 9 maintained states of yoke 1b down, when the contact 210 of switch 200 is disconnection.And, shown in the figure (a) and (b), be provided with the first space G1 at first position 8 of the end face of mover 2 and last yoke 1a, in addition and second position 9 of following yoke 1b between be provided with the second space G2.

Below, the magnetic circuit that first yoke 1 and second yoke 5 constitute is described.On first yoke 1, the magnetic flux by first magnetic circuit that first coil 3 or second coil, 4 excitations produced by the field power supply of not shown coil is by in the yoke 1 and in the mover 2.The  of Figure 17 that it is equivalent to represent in the conventional art (b) and Fig. 8 (b) of describing later _Coil2-1And  _Coil2-2

By the magnetic flux of this first magnetic circuit, make mover 2 come and go mobile with stroke G1 and stroke G2-t at the first direction of yoke 1.At this, in the time will making switch 200 work to the off-state of the contact 210 of Fig. 3 (b), shown in Fig. 8 (b),, produce  by to second coil, 4 excitations from the closure state of the contact 210 of Fig. 3 (a) _Coil2-1And  _Coil2-2, mover 2 is driven from second position 9 of first position, the 8 downward yoke 1b of last yoke 1a and is equivalent to the distance that given stroke is G2-t.

In addition, the closure state from the off-state of the contact 210 of Fig. 3 (b) to Fig. 3 (a) is by to first coil, 3 excitations, drives mover 2 and carries out.Like this, in yoke 1, have: the function that forms the magnetic circuit that the magnetic flux by first magnetic circuit that first coil 3 or second coil, 4 excitations are produced passes through.Therefore, in order to reduce the vortex flow that is accompanied by coil magnetization and produces in yoke 1, yoke 1 adopts electromagnetism steel-sheet stepped construction.

Because mover 2 also is owing to same reason adopts electromagnetism steel-sheet stepped construction, as shown in Figure 4, for by steel plate system end plate 10, the firm structure by fastening bolt 11.

It should be noted that, at this, described first,

second coil

3,4 can be respectively to be formed by the coil that a plurality of coils constitute, as mentioned above, in order to drive mover 2 necessary coils not specific is first, second coil, can cooperate the control characteristic of electromagnetic operating device 100 that a plurality of such coils are set.And its position also can be the tertiary coil that the function that realizes first coil is set at the position that is provided with second coil 4.

Second yoke 5 is installed on the second direction with the first direction quadrature as shown in Figure 1, is second yoke, 5 → side yoke 1c → go up yoke 1a or yoke 1b → mover 2 → permanent magnet 6 → the second yokes 5 down based on the magnetic flux circuit of second magnetic circuit of permanent magnet 6.

Promptly comprise the whole of the embodiment 2～6 that describes later, second yoke 5 of the embodiment of the invention 1 has the function of the magnetic circuit that the magnetic flux of taking on permanent magnet 6 passes through, and does not have the function of first magnetic circuit that magnetic flux that described first or second coil produces passes through.Promptly as Fig. 1 or Fig. 9 that describes later, shown in Figure 10, permanent magnet is arranged on second magnetic circuit that is made of first yoke, second yoke and mover of removing first magnetic circuit.Therefore, second yoke 5 adopts solid steel plate, but might not be this structure, considers manufacture method, cost etc., shown in Fig. 1 (b), can adopt electromagnetism sheet metal or steel-sheet stepped construction.In addition, first yoke 1, mover 2 are that the electromagnetism steel-sheet is stacked, but also can be that steel-sheet is stacked.Second yoke 5 is a pair of yoke, but might not be a pair of, can be the structure in the one-sided setting of first yoke 1.

The structure of mover 2 is described below.As shown in Figure 4, mover 2 is trapezoidal with the end face that first position 8 or second position 9 of first yoke 1 contact promptly at the both ends of the surface 2b of first direction.In other words, the sectional area that the magnetic flux of the general 2a of portion (arbitrary section of the mover 2 parallel with end face 2b) beyond the sectional area ratio end face 2b that magnetic flux passes through among the end face 2b passes through is little.By adopting such structure, the magnetic pull optimization that coil is produced, the control characteristic of electromagnetic operating device 100 improves.It should be noted that in Fig. 4, expression both ends of the surface 2b is trapezoidal, but is not limited thereto, and can be concavity or convex etc., if the end face 2b of mover 2 compares with the general 2a of portion, magnetic flux is little, just can.

In addition, as shown in Figure 4, adopted the structure that steel plate system end plate 10 is set at two ends, but also can be the structure that is provided with at 3 places of two ends and central portion.

Below, other embodiment of mover 2 are described.

Shown in Fig. 5 (a), end plate 10a is provided with and cuts its a part of peristome 10b.It should be noted that, use the details of the electromagnetic operating device 100 of embodiment 2 key diagrams 5.The reason that this peristome 10b is set is when keeping mover 2c with second position 9 (off-state), as mentioned above, confining force is little just passable, so when keeping mover 2c at described second position 9, increase the space of permanent magnet 6 and mover 2c, magnetic flux from permanent magnet 6 to mover 2c is reduced, the control characteristic of electromagnetic operating device 100 is improved.Therefore, described peristome 10b in the place relative with permanent magnet 6, has with the size of permanent magnet 6 or is equivalent to its big or small matched size when mover 2c is positioned at second position 9.

The CONSTRUCTED SPECIFICATION of this mover 2c is described below with reference to Fig. 6.

Fig. 6 (a) is the side cross-sectional view of mover 2c, and Fig. 6 (b) is the A-A cross section of Fig. 6 (a).Fig. 6 (c) is expression and the figure that is arranged on the recess 2e overlap condition on the plywood 2d that describes later.

Mover 2c is made of laminated section 2f, the end plate 10a of fastening this laminated section 2f that screw-in is fixed on cuboid movable core 16 in the movable axis 209, the stacked plywood 2d that is made of the ㄈ type thin plate that is fixed on the movable core 16.Plywood 2d is provided with recess 2e, when stacked, by this recess 2e is overlapped each other, has not only guaranteed stacked dimensional accuracy, and, for the mechanical external force that acts on the plywood 2d, anti-sliding stop.

In addition, on end plate 10a, be provided with end plate end face 10c in the place of laminated section 2f away from end face 2g.By this end plate end face 10c being set, the end profit that produces among the energy relaxation layer lamination 2d.

The work of electromagnetic operating device 100 is away from same with the device shown in the conventional art, at this, with reference to Fig. 8 (a)～Fig. 8 (c) explanation once more.

(1) among Fig. 8 (a), the contact 210 of switch 200 is closure states, and mover 2 remains on first position 8 of first yoke 1, and first,

second coil

3,4 is not by excitation.Under this state, permanent magnet 6 forms two magnetic circuit L ₁And L ₂, produce each magnetic flux  _PM1And  _PM2At magnetic circuit L ₂In, shown in Fig. 3 (a), have space G1, so  _PM1Circuit compare  _PM2Magnetic resistance low,  _PM1＞＞ _PM2, produce attraction at

mover

2 and 1 of yoke.This attraction is represented by routine in the past expression formula.

(2) if to second coil, 4 excitations, it is become and permanent magnet 6 same polarities, then shown in Fig. 8 (b), produce magnetic flux  _Coil2-1And  _Coil2-2The magnetic flux  that synthetic permanent magnet 6 produces _PM1And  _PM2If,  _PM2+  _Coil2-1＞ _PM1- _Coil2-2, then produce the power that mover 2 is drawn to second position of

yoke

1,9 directions.

(3) if mover 2 leaves first position 8, the then  of yoke 1 _PM2+  _Coil2-1＞＞ _PM1- _Coil2-2So shown in Fig. 8 (c), mover 2 moves given stroke, arrive second position 9 of yoke 1.

(4) at this, if stop the excitation of second coil 4, then shown in Fig. 8 (c), mover 2 remains on second position 9 of yoke 1.

(5) then, when wanting from the state of Fig. 8 (c) during to the state-driven of Fig. 8 (a), by to first coil, 3 excitations, according to described identical principle, mover 2 moves given stroke.

As mentioned above, in yoke 1, move, the contact 210 that is connected the switch 200 on the mover 2 is disconnected closure, carry out electric power and carry the electric current of distribution system to interdict, drop into by mover 2.

It should be noted that,, describe the first space G1 and the second space G2 of present embodiment 1 at this.

The first space G1 shown in Figure 3 is the space at first position 8 of mover 2 and last yoke 1a, and the second space G2 is the space at second position of mover 2 and following yoke 1b.Space G2-t is arranged on down the space of 2 of the pad 13 of aluminium oxide on the yoke 1b or nonmagnetic substances such as SUS, copper and movers shown in Fig. 3 (a) and (b).

Be referred to as the magnetic space at this described first space G1 and the second space G2, described space G2-t is called mechanical space.And magnetic space G1, G2 get different values, G1＜G2, G2=G1+t.The stroke of described mover 2 is G2-t and G1.

It should be noted that, shown in Figure 5 as described later, reduce to disconnect confining force time or the thickness W of last yoke 1a when missing magnetic flux beyond the contact-making surface of energy follower ₁The thickness W of＞following yoke 1b ₂, in the time of reducing to disconnect confining force, can be G1=G2.

Like this, adopt the reason of first clearance G, 1 ≠ the second space G2 to be: when the confining force of mover 2 is off-state at switching device 500, compare with closure state, can reduce significantly, mover 2 is remained on first one (closure state) when being 8 (tops), keeps contact 200 disconnections mover 2 to be remained on second one when being 9 (belows) (off-state), the confining force difference of mover 2 contact 200 being remained closed promptly.Under off-state, make mover 2 can be owing to earthquake etc. and move to closure off hand just passable, so confining force can reduce significantly than closure state.

Therefore, for the confining force of the mover 2 of the magnetic flux that produces based on permanent magnet 6, by setting space G1 or the G2 corresponding with the on off state of electromagnetic operating device 100, energy optimization confining force can improve the control characteristic of electromagnetic operating device 100.

It should be noted that, in the present example, G2＞G1, but be not limited to this example, according to the configuration relation of switch 200 and electromagnetic operating device 100, non magnetic pad 13 can be set on last yoke 1a.

It should be noted that, shown in Figure 5 as described later, when missing magnetic flux beyond the contact-making surface that can follower 2 and reduce to disconnect confining force, maybe can make G1＞G2, when reducing to disconnect confining force, can be W ₁=W ₂

(embodiment 2)

Below, the electromagnetic operating device 100 of embodiment 2 is described with reference to Fig. 5, Fig. 7.

Fig. 5 (a) is the front view of electromagnetic operating device 100, and Fig. 5 (b) is an end view.It should be noted that in Fig. 5 (a), part has been omitted the record of second yoke 5.

In Fig. 5 (a), 1a is the last yoke of first yoke, 1b is following yoke, and 2c is a mover, and 3a is first coil, 4a is second coil, 10a is the end plate of

mover

2c, and 10b is arranged on the peristome on the described

end plate

10a, and 12 are arranged on the spring between yoke 1a and

mover

2c, 15 are arranged on the adjustment bolt on second yoke 5, W ₁Be the thickness of the described first direction of the described yoke 1a of going up, W ₂The thickness of the described first direction of yoke under being.

As mentioned above, the necessary confining force of contact 210 off-states of switch 200 reduces significantly than closure state.Therefore, when mover 2c is positioned at second position 9 of following yoke 1b, compare during with first position 8 that is positioned at yoke 1a, the magnetic flux density of yoke 1b is advanced little.The i.e. thickness W of the described first direction of the following yoke 1b of first yoke 1 ₂Can be than the thickness W of last yoke 1a ₁Little.

Like this, by reducing the thickness of yoke 1b down, can carry out the adjustment of confining force, and can realize the minimizing of electromagnetic operating device 100 weight.

In addition, when mover 2c from first position 8 when move at second position 9, be arranged on spring 12 auxiliary moving between yoke 1a and mover 2c, so the magnetomotive force of the second coil 4a (AT) can be littler than the first coil 3a, so the sectional area of the second coil 4a is little, can miniaturization, thus can seek miniaturization, the lightness of electromagnetic operating device 100, the low capacityization of power supply.

In addition, shown in Fig. 7 (a), recess 1d is set,, can adjusts confining force by adjusting mover 2c and the relative area of upper and

lower yoke

1a, 1b contact at first,

second position

8,9 of last yoke 1a, following yoke 1b.In addition, shown in Fig. 7 (b),, also can adjust confining force equally even protuberance 1e is set.

In addition, shown in Fig. 5 (b), on second yoke 5, be provided with and adjust bolt 15,, make between first yoke 1 and second yoke 5 and produce the gap by operating this adjustment bolt 15.The space of the permanent magnet 6 that is arranged on second yoke 5 and mover 2c is increased.Like this, in the gap of

first yoke

1 and 5 generations of second yoke, can insert steel plates such as having omitted illustrated sheet metal and electromagnetic steel plate.

By adopting such structure, can change the space of permanent magnet 6 and mover 2c, can adjust confining force.

(embodiment 3)

Among the

embodiment

1,2, represent the device that is shaped as rectangular configuration of second yoke 5, but in embodiment 3, as shown in Figure 9, as the second yoke 5a of E shape.And, in the central spud of described E shape permanent magnet 6a is set, when being installed to side yoke 1c when going up, relative with mover 2 by gap g.

Described 1 couple of yoke 5a is installed on the side yoke 1c by having omitted illustrated bolt or fastenings.It should be noted that this second yoke 5a also can be any one of solid steel plate or electromagnetism steel-sheet stepped construction.

And, the position relation of configuration permanent magnet 6a is shown in Figure 10 (a) on the second yoke 5a, also can the two ends protuberance of the second yoke 5a or the omission that contacts with the two ends protuberance illustrated first yoke 1 end face or shown in Figure 10 (b), at the root of two ends protuberance or shown in Figure 10 (c), permanent magnet 6a is set at the root of central spud.In addition, shown in Figure 10 (d), (f), also can be the described such configuration of Figure 10 (e) of synthesizing or describing later.Promptly can be to constitute the structure that clips configuration in the way of end face, magnetic circuit of member of magnetic circuit of the second yoke 5a, by the member that constitutes the second yoke 5a.

Promptly can be to remove first magnetic circuit that forms by to first,

second coil

3,4 excitations and on first yoke 1 and mover 2, permanent magnet 6a be arranged on the structure on second magnetic circuit that is formed by first yoke 1, second yoke 5 and mover 2.

(embodiment 4)

In embodiment 1～3, be illustrated in the electromagnetic operating device 100 that second direction disposes the structure of

second yoke

5,5a, but in embodiment 3, as Figure 11, shown in Figure 12, at the second yoke 5b of first direction configuration E shape, be installed on yoke 1a or the following yoke 1b by having omitted illustrated bolt or fastenings.

At this Figure 11 is the schematic diagram of expression main composition part, and Figure 12 is the schematic diagram of the electromagnetic operating device 100 after installing.Permanent magnet 6b is arranged on the central spud of the described E shape of the E shape second yoke 5b, and is relative with mover 2 across gap g in the time of on being installed in yoke 1, but in addition, also can be the configuration of described Figure 10 (a)～(d), (f).It should be noted that,, the second yoke 5b of embodiment 4 also can be any one of solid steel plate or electromagnetism steel-sheet stepped construction.The second yoke 5b is a pair of, but might not be a pair of, also can be the structure in the one-sided setting of first yoke 1.

(embodiment 5)

Embodiment 5 represents that the second yoke 5c is shaped as the C shape, and is arranged on the structure of first direction shown in the schematic diagram of Figure 13.

As shown in figure 13, yoke 5c is configured to clip first coil 3 at the recess of C shape, and the protuberance on the top of yoke 5c is installed on the yoke 1a by omitting illustrated bolt or fastenings.Protuberance (in Figure 13, the protuberance of bottom) the opposing party is provided with permanent magnet 6c, and is relative with mover 2, but also can be the configuration of Figure 10 (e).

This second yoke 5c can be any one of solid steel plate or electromagnetism steel-sheet stepped construction also with described same.In addition, in Figure 13, expression is installed in example on the yoke 1a to the second yoke 5c, still also can be mounted in down the structure on yoke 1b one side.Though the second yoke 5c is a pair of yoke, might not be a pair of, also can be structure in the one-sided setting of first yoke 1.

(embodiment 6)

Present embodiment 6 is that magnet exciting coil is 1 shown in the schematic diagram of Figure 14, and this coil 3a is set in yoke 1, and as shown in figure 15, is provided with the electromagnetic operating device 100 of the structure of spring 12 between first position 8 of last yoke 1a and mover 2.

Below, the also action of the electromagnetic operating device 100 of reference 16 these structures of explanation.When Figure 15 is equivalent to Figure 16 (c) and is the off-state of contact 210.Under this state, because the magnetic flux  of permanent magnet 6c shown in Figure 16 _PM2, mover 2 remains on second position 9.Then, when contact 210 is closure, if, then formed and the reverse magnetic circuit of situation shown in Figure 16 (b) to the contrary excitation of coil 3a.In view of the above, the magnetic flux  of coil 3a _Coil1-2-permanent magnet magnetic flux  _PM2The magnetic pull that causes reduces, and mover 2 drives to first position 8 from second position 9 with given stroke.And when make mover 2 from contact 210 closure states of Figure 16 (a) when the off-state of Figure 16 (c) moves, by to coil 3a excitation, make  _Coil1-1Produce.This  _Coil1-1Can be the magnetic flux  that offsets by described permanent magnet 6c _PM1The magnetic flux of degree that keeps the gravitation of movers 2 at first position 8 of last yoke 1a.If offset described gravitation, then owing to the spring 12 that is arranged between mover 2 and last yoke 1a, move at second position 9 of mover 2 downward yoke 1b.

By adopting such structure, can reduce the magnetomotive force of coil 3a, not only become small-sized electromagnetic operating device 100, and coil power is also little.

It should be noted that, though the second yoke 5c is installed on the yoke 1a, but be not limited to this example, also can be installed in down on the yoke 1b, in addition, because with the balance of spring of the secondary spring 300,301 of the switching device 500 of Figure 19 of expression in the prior art, so also can be in that

yoke

1b and 2 of movers be provided with spring 12 down.In addition, spring 12 is not limited to yoke 1a, following yoke 1b, can be arranged on the outside of first yoke 1, if just passable in the Drive Structure of first direction driving mover 3.In addition, expression is provided with the example of spring 12, but is not limited to spring 12, can be to have utilized other elastomers such as the mechanism of oil pressure, pneumatics or rubber.In addition, the second yoke 5c is the C shape, be installed on the first direction, but be not limited thereto, and also can be rectangle or E shape, be installed on the second direction.

In addition, expression is provided with the example of a coil 3a, but this coil can be a plurality of coils, shown in figure embodiment 1, first, second coil can be set.

In addition, be illustrated in the example that uses electromagnetic operating device 100 in the switch motion of switch 200 of switching device 500 of circuit, but be not limited thereto, the switch, the switch etc. that carries out door of valve that can be applied to the transmission line of gas and liquid certainly comes and goes in the machine that moves.It should be noted that, at this moment, the spring 300,301 of the Figure 19 that represents in the example in the past need not be set, realized the miniaturization of switching device 500.

In sum, structure of the present invention is: first yoke is shared based on the mover driving of coil magnetization and is used magnetic circuit, and the permanent magnet that is arranged on second yoke is shared mover maintenance magnetic circuit.Therefore the present invention has the effect that the electromagnetic operating device that makes the response characteristic raising can be provided.

Claims

1. an electromagnetic operating device is characterized in that, comprising:

First yoke that comprises the assembly of laminated metal thin plate;

Be attached to vertical lip-deep second yoke of stacked direction with the sheet metal of described first yoke;

Be attached to the permanent magnet on described second yoke;

In described first yoke and along first direction on described first yoke first position and the stroke between second position in can come and go mobile mover; And

At least one coil,

Wherein, the magnetic flux that is produced by described at least one coil is by comprising first magnetic circuit of the described mover and first yoke, thereby moves described mover towards the direction at one of them position at described first and second positions, and,

The magnetic flux that is produced by described permanent magnet is by comprising second magnetic circuit of described permanent magnet, first yoke, second yoke and described mover, thereby keeps described mover at one of them position at described first and second positions.

2. electromagnetic operating device according to claim 1 is characterized in that:

Described permanent magnet is between described first yoke and second yoke or in the end of second yoke relative with described mover.

3. electromagnetic operating device according to claim 1 is characterized in that, also comprises:

When described mover is maintained at first position, the second magnetic space between the end face of described second position and the described mover relative with second position; With

When described mover is maintained at second position, the first magnetic space that is different from the second magnetic space between the end face of described first position and the described mover relative with first position.

4. electromagnetic operating device according to claim 1 is characterized in that:

Described second yoke is along described first direction orientation.

5. electromagnetic operating device according to claim 1 is characterized in that:

Described second yoke is along the second direction orientation vertical with described first direction.

6. electromagnetic operating device according to claim 1 is characterized in that:

Described second yoke comprises the assembly of laminated metal thin plate.

7. electromagnetic operating device according to claim 1 is characterized in that:

The cross-sectional area at second position of described first yoke is less than the cross-sectional area at first position of described first yoke.

8. electromagnetic operating device according to claim 1 is characterized in that:

Described first yoke has step-like surface, and when described mover was maintained at arbitrary position in first and second positions, described step-like surface formed the localized voids between first yoke and the described mover.

9. electromagnetic operating device according to claim 1 is characterized in that, also comprises:

Be arranged on the adjustment bolt on second yoke, wherein said permanent magnet is attached on second yoke, makes the space between described mover and the permanent magnet variable by operating described adjustment bolt, thereby can insert sheet metal between second yoke and first yoke.

10. electromagnetic operating device according to claim 1 is characterized in that:

Described at least one coil comprises a plurality of coils.

11. electromagnetic operating device according to claim 1 is characterized in that:

State in the place, end of described mover that magnetic flux passes through, perpendicular to the area of the cross section of described first direction other parts less than described mover.

12. electromagnetic operating device according to claim 1 is characterized in that:

Described mover comprises the assembly of laminated metal thin plate.

13. electromagnetic operating device according to claim 12 is characterized in that:

The laminated metal thin plate of described mover tightens together by the two ends of firm end plate at the assembly of the laminated metal thin plate of described mover.

14. electromagnetic operating device according to claim 13 is characterized in that:

The outer surface of each described end plate all is positioned at the end face of assembly of the laminated metal thin plate of described mover.

15. electromagnetic operating device according to claim 1 is characterized in that:

Described permanent magnet is between the element of described second yoke.

16. electromagnetic operating device according to claim 1 is characterized in that, also comprises:

Move the driving mechanism of described mover along first direction.

17. electromagnetic operating device according to claim 1 is characterized in that:

Described permanent magnet is arranged in described second magnetic circuit that is different from described first magnetic circuit.